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Robust two-factor authentication and key agreement preserving user privacy

International Journal of Network security 2014年第3期16卷 229-240页

作者： Jiang, Qi Ma, Jianfeng Li, Guangsong Yang, Li School of Computer Science and Technology Xidian University No.2 South Taibai Road Xi'an Shaanxi 710071 China Science and Technology on Communication Information Security Control Laboratory 36 Research Institute CETC Jiaxing 314033 China Department of Information Research Zhengzhou Information Science and Technology Institute No.5 Wenhua Road Zhengzhou Henan 450002 China

In this paper, we first give a new set of design goals for anonymous two-factor authentication scheme. The new set is a refinement of some previously proposed requirement sets;it not only eliminates the redundancies, conflicts and ambiguities of the old ones, but also provides more desired security properties. Then we demonstrate that both of Sun et al.'s scheme and Li et al.'s scheme fail to satisfy all the security goals we propose. Specifically, we point out that Sun et al.'s scheme still suffers from the smart card loss problem and fails to provide user untraceability. Li et al.'s scheme is vulnerable to desynchronization attack. In order to remedy these defects in their schemes, we propose a robust two-factor authentication and key agreement scheme with user privacy preservation achieving all the goals we present. Compared with the previous schemes, our scheme not only provides more security guarantees, but also is still efficient both in computation and communication cost.

关键词： Smart cards

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A secure model based on game theoretic malicious detection mechanism for MANETs

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Journal of information and Computational science 2014年第2期11卷 481-491页

作者： Wang, Xiao Feng, Renjian Wu, Yinfeng Ren, Yongji Wan, Jiangwen School of Instrumentation Science and Opto-Electronics Engineering Beihang University Beijing 100191 China Department of Command Naval Aeronautical and Astronautical University Yantai 264001 China Science and Technology on Communication Information Security Control Laboratory Jiaxing 314033 China

Mobile Ad Hoc network security is facing tougher challenges due to emerging purposive strategic attacks conducted by smart malicious nodes. All these purposive strategic attacks run out of the throughput which results in network crashes. In this paper, we have proposed a secure model based on two-level dynamic Bayesian game theory to recognize these purposive strategic attacks in MANETs and establish a malicious nodes detection system isolating such attacks. The simulation results have demonstrated that the proposed model can effectively enhance cooperative performance and maintain packet forwarding rate under the purposive strategic attacks. Besides, through two-level decision, the system performs well in reducing the false alarming rate for large proportion of malicious nodes in MANETs. Copyright © 2014 Binary information Press.

关键词： Game theory

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Spectrum leasing and relay selection in multiuser cooperative cognitive radio networks

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Journal of Communications 2014年第3期9卷 198-207页

作者： Tang, Yi Grace, David Wang, Lijie College of Electronic Science and Engineering National University of Defense Technology Hunan 410073 China Science and Technology on Information System Security Laboratory China Department of Electronics University of York York YO10 5DD United Kingdom Beijing Aerospace Control Center Beijing China

In this paper, we consider multiple primary and multiple secondary users cooperative cognitive radio networks, in which the primary users (PUs) lease a portion of their spectrum to the secondary users (SUs) for some revenue, and in return the SUs play as relays and help forward the data of the Pus in exchange for being granted spectrum opportunities. Both the PUs and SUs aim to maximize their own utilities. The spectrum leasing and relay selection problem is studied. We formulate the spectrum leasing problem as a Stackelberg game, and transform the relay selection problem as an assignment problem which is solved by the Hungarian method. Numerical results show that, under the proposed cooperative spectrum leasing-optimal-relay-selection scheme, both the primary and secondary network can achieve high utilities. © 2014 Engineering and technology Publishing.

关键词： Cognitive radio

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Passive satellite localization using TDOA/FDOA/AOA measurements

Passive satellite localization using TDOA/FDOA/AOA measureme...

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2013 IEEE Conference Anthology, ANTHOLOGY 2013

作者： Bin, Yang Zheng Lei, Wang Qun, Chen Pei Nan, Lu An Science and Technology on Communication Information Security Control Laboratory Jiaxing Zhejiang 314033 China

ISBN: (纸本)9781479916603

Dual satellite TDOA/FDOA localization scheme has problems of multiple ambiguous solutions and poor localization results in the sub-satellite area along the dual satellite baseline direction. Passive localization using TDOA and FDOA measurements usually does not have direct solution and requires numerical methods to determine the emitter's geolocation. We suggest a satellite passive localization method fusing the TDOA/FDOA/AOA measurements based on particle swarm optimization(PSO), which provides an evolutionary computation method to solve the nonlinear optimal problem. To be more close to the practical use, the WGS-84 earth model is adopted in this work. However, PSO can not be directly applied to geolocation problem due to the nonlinear constraint of earth surface. We examined a PSO based method which let the particle swarm fly on the earth surface. Computer simulation results show the effectiveness of the new localization method. © 2013 IEEE.

关键词： Time difference of arrival

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An octree-based proxy for collision detection in large-scale particle systems

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science China(information sciences) 2013年第1期56卷 55-64页

作者： FAN WenShan WANG Bin PAUL Jean-Claude SUN JiaGuang School of Software Tsinghua University Beijing Aerospace Control Center Department of Computer Science and Technology Tsinghua University Key Laboratory for Information System Security Ministry of Education of China Tsinghua National Laboratory for Information Science and Technology Institut National de Recherche en Informatique et en Automatique(INRIA)

Particle systems are important building block for simulating vivid and detail-rich effects in virtual *** of the most difficult aspects of particle systems has been detecting collisions between particles and mesh *** to the huge computation,a variety of proxy-based approaches have been proposed recently to perform visually correct ***,all either limit the complexity of the scene,fail to guarantee non-penetration,or are too slow for real-time use with many *** this paper,we propose a new octree-based proxy for colliding particles with meshes on the *** approach works by subdividing the scene mesh with an octree in which each leaf node associates with a representative normal corresponding to the normals of the triangles that intersect the *** present a view-visible method,which is suitable for both closed and non-closed models,to label the empty leaf nodes adjacent to nonempty ones with appropriate back/front property,allowing particles to collide with both sides of the scene *** show how collisions can be performed robustly on this proxy structure in place of the original mesh,and describe an extension that allows for fast traversal of the octree structure on the *** experiments show that the proposed method is fast enough for real-time performance with millions of particles interacting with complex scenes.

关键词： particle systems collision detection octree-based proxy GPU

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Critical nodes selection based on trust evaluation in Ad Hoc networks

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Tongxin Xuebao/Journal on Communications 2014年 35卷 213-219页

作者： Liu, Zhuo-Chao Yang, Li Jiang, Qi Wang, Wei Cao, Chun-Jie School of Computer Science and Technology Xidian University Xi'an710071 China Science and Technology on Communication Information Security Control Laboratory The 36th Research Institute of CETC Jiaxing314033 China College of Information Science and Technology Hainan University Haikou570228 China

There are some critical nodes in Ad Hoc networks, and the failure of these critical nodes can critically affect the performance of the network. For the aim of selecting the important and trusted critical nodes in Ad Hoc networks, the definition of critical nodes is given, meanwhile, a critical nodes selection algorithm based on trust evaluation is proposed. By using the node contraction, the importance degree of the node is calculated. Then combined with D-S evidence theory, the trust evaluation model of critical node is presented, which is used to obtain the objective trust of the node and to judge the credibility of the node. Finally, the critical nodes are selected by considering of the importance degree and the credibility of the node. Simulation results show that when those critical nodes are failure, selected by the proposed algorithm, the network performance is decreasing significantly. ©, 2014, Editorial Board of Journal on Communications. All right reserved.

关键词： Ad hoc networks

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Lidar echo characteristics analysis for stepped terrain

Lidar echo characteristics analysis for stepped terrain

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8th International Symposium on Precision Engineering Measurements and Instrumentation

作者： Jia, Yudong Zhang, Xiaoqing Lv, Yong Lang, Xiaoping School of Instrument Science and Opto-electronics Engineering Beijing Information Science and Technology University Beijing 100192 China Science and Technology on Electro-Optical Information Security Control Laboratory Sanhe 065201 China

ISBN: (纸本)9780819495501

According to the gridded discrete processing method, the laser echo characteristics in the case of ladder terrain ground are analyzed theoretically, and the ladder-like terrain echo mathematical model are established. We find from the work that these two peaks of ladder terrain echo curve is the reflecting of ladder and ground respectively, the time interval between wave peaks is determined by the mutations height of terrain. The mutations height is higher, pulse shaping is more obvious, it is also shown that ground reflectivity in the laser spot affects the size of the echo peak mainly, and does not affect the peak location on the curve. © 2013 SPIE.

关键词： Ladders

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Micro-hole fabrication based on focus-shaped radially polarized beams

Micro-hole fabrication based on focus-shaped radially polari...

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8th International Symposium on Precision Engineering Measurements and Instrumentation

作者： Du, Furong Zhou, Zhehai Zhang, Xiaoqing Zhu, Lianqing Beijing Engineering Research Center of Optoelectronic Information and Instruments Beijing Information Science and Technology University Beijing 100192 China Science and Technology on Electro-Optical Information Security Control Laboratory Sanhe 065201 China

ISBN: (纸本)9780819495501

A micro-hole fabrication scheme based on focus-shaped radially polarized beams is presented. First, a micro-hole fabrication system is demonstrated based on the focus shaping of radially polarized beams, where a high energy ultra-small spot with a long depth of focus can be obtained by focus shaping using the combination of a diffractive optical element (DOE) and a high numerical-aperture objective, and such focused spot is preferred to fabricate the micro-hole with a high ratio of depth and radius. Then, diffractive optical elements (DOEs) are designed to achieve such ultra-small spots with a long depth of focus using the global search algorithm, and the focus-shaped field intensities are calculated based on vector diffraction theory. Finally, a conclusion is drawn from the theoretical analysis and numerical simulation, and focus-shaped radially polarized beams are suitable to fabricate the micro-hole with a high ratio of depth and radius. © 2013 SPIE.

关键词： Diffractive optical elements

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Adaptively secure key-policy ABE scheme with fast decryption

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Tongxin Xuebao/Journal on Communications 2014年 35卷 26-32页

作者： Li, Qi Ma, Jian-Feng Xiong, Jin-Bo Liu, Xi-Meng School of Computer Science and Technology Xidian University Xi'an710071 China Shaanxi Key Laboratory of Network and System Security Xidian University Xi'an710071 China Science and Technology on Communication Information Security Control Laboratory Jiaxing314033 China Faculty of Software Fujian Normal University Fuzhou350108 China School of Telecommunication Engineering Xidian University Xi'an710071 China

In the existing adaptively secure ABE (attribute-based encryption) schemes, the decryption cost goes linearly with the number of attributes that are used in decryption. An adaptively secure key-policy ABE (FKP-ABE) scheme with fast decryption is proposed, where constant size of computation overhead is implemented in decryption. This scheme is constructed on composite order bilinear groups and supports any monotonic access structure that can be expressed by LSSS (linear secret sharing schemes). The proposed scheme is proved to be adaptively secure in the standard model. ©, 2014, Editorial Board of Journal on Communications. All right reserved.

关键词： Cryptography

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Generation of cylindrical vector beams with a cat-eye cavity laser and a Mach-Zehnder interferometric arrangement

Generation of cylindrical vector beams with a cat-eye cavity...

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8th International Symposium on Precision Engineering Measurements and Instrumentation

作者： Xiao, Baoling Hu, Zhaohui Zhou, Zhehai Zhang, Shulian Yang, Jie Wang, Xiaoling Zhu, Lianqing Beijing Engineering Research Center of Optoelectronic Information and Instruments Beijing Information Science and Technology University Beijing 100192 China Science and Technology on Inertial Laboratory School of Instrumentation Science and Optoelectronic Engineering Beihang University Beijing 100191 China State Key Laboratory of Precision Measurement Technology and Instruments Tsinghua University Beijing 100084 China Science and Technology on Electro-Optical Information Security Control Laboratory Sanhe 065201 China

ISBN: (纸本)9780819495501

A novel method to generate cylindrical vector beams is presented based on a cat-eye cavity laser and a Mach-Zehnder interferometric arrangement. Some transverse modes can be generated by the cat-eye cavity laser and then superimposed by the Mach-Zehnder interferometric arrangement to form different kinds of cylindrical vector beams. First, simulations of four kinds of cylindrical vector beams based on four kinds of combinations of transverse modes are made and other situations are also discussed when the two beams are in-phase, 180° out-of-phase and with other phase difference. Then, an experimental set-up based on a cat-eye cavity laser and a Mach-Zehnder interferometric arrangement is built, and four forms of cylindrical vector beams generated by the experiment system. The experimental results agree well with the simulative results. © 2013 SPIE.

关键词： Vectors

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